James is stargazing. One day, he found out that one of the stars are red. What could be the cause?
Classical Mechanics
Level
2
Assumptions:
1.) When he observed the stars, they weren't reddish.
2.) He predicted that something might be causing the stars to appear red.
Dark Energy
Red Giant stage
Fluorine
Dark Matter
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1 solution
When Einstein published his general relativity, he thought of something called "the cosmological constant" Then, Edwin Hubble discovered that when stars appear redder, they are farther way from us.